PCA9506BS,118

I/o Expanders Overview

The PCA9506BS,118 is a 40-bit I2C-bus I/O expander from NXP Semiconductors, organized in five banks of eight I/Os. It operates within a supply voltage range of 2.3 V to 5.5 V and supports standard mode (100 kHz) and fast mode (400 kHz). The device features an active LOW output enable pin that three-states outputs when high, and an open-drain interrupt output for monitoring input changes. It includes hardware reset and power-on reset capabilities, with three address select pins allowing up to eight devices on the same bus. The component is housed in a 56-terminal HVQFN package and is specified for industrial temperatures ranging from -40 °C to +85 °C.

I/o Expanders Feature Summary

• Provides 40 configurable I/O pins that default to inputs at power-up
• Features an active LOW output enable pin to three-state all outputs simultaneously
• Includes an open-drain active LOW interrupt output for monitoring logic level changes
• Supports live insertion with IOFF circuitry and robust state machine

I/o Expanders Applications

• Servers
• RAID systems
• Industrial control
• Medical equipment
• PLCs

I/o Expanders Procurement Notes

Verify the ordering part number PCA9506BS,118 against the manufacturer's current product data sheet to confirm availability and specifications. Ensure the HVQFN56 package variant matches the design requirements. Check for any discontinuation notices or recommended replacements issued by NXP Semiconductors prior to finalizing procurement plans.

I/o Expanders Selection Notes

Select the PCA9506BS,118 when low standby current is required, as it lacks the internal pull-up resistors found in the PCA9505. This makes it suitable for applications where inputs are driven by push-pull drivers or when minimizing power consumption during output usage is critical. Confirm that external pull-ups are provided if necessary for the specific I2C bus configuration.

I/o Expanders Part Context

The PCA9506BS,118 belongs to the PCA9505/PCA9506 family of 40-bit I2C-bus I/O expanders. While functionally identical to the PCA9505 regarding register mapping and interface, the PCA9506 series omits internal pull-up resistors to reduce power consumption. The 'BS' suffix indicates the HVQFN56 package type, distinguishing it from the TSSOP56 package used by the DGG suffix variants.

I/o Expanders Replacement Considerations

The PCA9505DGGY is documented as a drop-in replacement for discontinued TSSOP56 variants. For the HVQFN56 package, verify direct compatibility with other PCA9506BS parts or consult NXP for updated equivalents.